AAT3696IWP-6-T1 [SKYWORKS]
Power Supply Support Circuit;
| 型号： | AAT3696IWP-6-T1 |
| 厂家： | 
SKYWORKS SOLUTIONS INC. |
| 描述： | Power Supply Support Circuit |
| 文件： | 总21页 (文件大小：3004K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
General Description
Features
•
•
•
•
•
The AAT3696 BatteryManager™ is a single-cell lithium-
ion (Li-Ion)/Li-Polymer battery charger IC designed to
operate from USB ports or AC adapter up to an input
voltage of 6.5V or 6.05V (depending on the option1). For
increased safety, the AAT3696 also includes over-voltage
input protection (OVP) up to 28V.
USB or AC Adapter System Power Charger
3.0V ~ 6.5V or 6.05V Input Voltage Range
2.8V Typical Under-Voltage Lockout Threshold
Fast Over-Voltage Protection Turn Off
Two OVP Turn-On Delay Time Options:
40μs
80ms
▪
▪
The AAT3696 precisely regulates battery voltage after it
has reached 4.2V or 4.375V (depending on the option1)
Li-Ion/Polymer battery cells through an extremely low
RDS(ON) switch. The charging current can be set by an
external resistor up to 1.6A. In case an over-voltage
condition occurs from the input, a series switch quickly
opens and a fault flag is activated to prevent damage to
the battery and charging circuitry.
•
•
Two OVP Trip Point Options:
Protection Trip at 6.75V
Protection Trip at 6.25V
High Level of Integration with Internal:
▪
▪
Power Device
Reverse Current Blocking
Current Sensing
▪
▪
▪
•
4.9V/30mA LDO Output Through Over-Voltage
Protection Device
Other fault conditions are monitored in real time. In case
of an over-current, battery over-voltage, short circuit, or
over-temperature failure, the device will automatically
shut down, thus protecting the charging device, control
system, and the battery under charge. A status monitor-
ing output pin (STAT) is provided to indicate charging
activity. This open-drain output pin can be used to drive
an external LED as a charging indicator. The AAT3696
has two charge termination mode selections when the
battery voltage has reached the constant voltage level
VCO(REG) and the charging current has decreased the ter-
mination current level.
•
•
•
•
•
•
•
Programmable Current from 100mA to 1.6A Max
Charge Status Indicator
Automatic Recharge Sequencing
Automatic Trickle Charge For Battery Pre-Conditioning
Emergency Thermal Shutdown Protection
Power on Reset and Soft Start
Active Low Enable with Internal 200kΩ Pull-Down
Resistor
•
Two Charge Termination Control Selections:
Manual: Continuous Battery Charging Until Charge
Termination by Enable Pin
▪
Automatic: Battery Charging is Terminated with
Transition to Sleep State
12-pin 3x3mm TDFN Package
▪
The AAT3696 offers a 4.9V/30mA LDO linear regulator.
This regulator is enabled all the time regardless of the
status of the charger and protected by the OVP switch.
•
The AAT3696 is available in the Pb-free, thermally
enhanced, space-saving 3x3mm TDFN33-12 package and
is rated over the -40°C to +85°C temperature range.
Applications
•
•
•
•
•
Bluetooth™ Headsets, Headphones, Accessories
Digital Still Cameras
Mobile Telephones
MP3 Players
Personal Data Assistants (PDAs)
1. Please refer to Table 9 on page 19 for complete list of options.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Application
IN
VADP
BATT+
BAT
1μF
BATS
OVPFLG
INCHR
OVPFLG
INCHR
10μF
IC
BATT-
LDOOUT
10kΩ
Battery
Pack
2.2μF
AAT3696
STAT
LDOOUT
ISET
2.2μF
EN
ON/OFF
System
MODE
GND
RSET
Pin Descriptions
Pin #
Name
Type
Function
Output of over-voltage protection (OVP) stage and input to battery charger. Decouple to GND
with 2.2μF capacitor.
1
INCHR
I/O
2
3
4
5
IN
I
Input from USB port or AC adapter.
4.9V/30mA LDO output through OVP device. Bypass to GND with 2.2μF capacitor.
Over-voltage fault flag, open drain, active low.
LDOOUT
OVPFLG
STAT
O
O
O
Charge status indicator pin, open drain, active low.
MODE selection pin (internal connect with a 200kꢀ pull-up resistor to INCHR). Factory default
at 10% termination current if MODE is open or connect to INCHR. Continues to charge if
MODE is connect to GND.
6
MODE
I
7
8
9
10
11
12
GND
EN
ISET
IC
BATS
BAT
I/O
I
I
I
I
Power ground.
Active low enable pin (internal connect with a 200kꢀ pull-down resistor).
Connect RSET resistor here to set adaptor or USB charging current.
Internally connected through 100kꢀ resistor to GND. Leave this pin open.
Battery voltage remote sense input.
O
Connect to Li-Ion battery.
Exposed paddle (bottom); The exposed thermal pad (EP) should be connected to board
ground plane and pin 7. The ground plane should include a large exposed copper pad under
the package for thermal dissipation (see package outline).
EP
Pin Configuration
TDFN33-12
(Top View)
1
2
3
4
5
6
12
11
10
9
INCHR
IN
BAT
BATS
IC
LDOOUT
OVPFLG
STAT
ISET
EN
8
7
MODE
GND
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Absolute Maximum Ratings1
Symbol
Description
Value
Units
VIN
VP
VN
TJ
TA
IN continuous
-0.3 to 30
-0.3 to 7.5
-0.3 to VP + 0.3
-40 to 150
-40 to 85
V
V
V
°C
°C
°C
INCHR, EN, STAT, OVPFLG, MODE
BAT, BATS, LDOOUT, ISET, IC
Junction Temperature Range
Operating Temperature Range
Maximum Soldering Temperature (at Leads)
TLEAD
300
Thermal Information2
Symbol
Description
Value
Units
JA
PD
Maximum Thermal Resistance (TDFN33-12)
Maximum Power Dissipation
50
2
°C/W
W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Mounted on an FR4 board.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Electrical Characteristics1
VIN = 5V, TA = -40 to +85°C, RSET = 3.16kꢀ, VMODE = 0V, BAT = BATS, unless otherwise noted. Typical values are at TA
= 25°C
Symbol Description
Operation
Conditions
Min
Typ
Max Units
VIN_MAX
Input Over-Voltage Protection Range
28
6.5
6.05
0.6
V
V
Refer to Table 4
Refer to Table 4
RSET = 15.8 kꢀ, VEN = 0V, VIN = 5V
3.0
3.0
VIN
Normal Operating Input Voltage Range2, 3
IOP
Operating Current
Charge Function Shutdown Supply
Current (OVP function still active)
0.5
160
0
mA
μA
μA
ISD
VIN =VEN = 5.5V
220
1
IBAT
Leakage Current from BAT Pin
VBAT = 4V, IN Pin Open
Over-Voltage Protection
VIN Rising Edge; Refer to Table 4
VIN Rising Edge; Refer to Table 4
6.5
6.05
6.75
6.25
100
7.0
6.45
Over-Voltage Protection Trip Point2, 3
V
VOVPT
Hysteresis
Dropout Voltage between IN and INCHR
Pins
mV
mV
VDO_OVP
VIN = 5V, ILOAD@BAT = 1000mA, RSET = 1kꢀ
VIN Rising edge
200
Battery Charger
Under-Voltage Lockout Threshold
UVLO Hysteresis
2.5
2.8
150
3.0
V
mV
VUVLO
Dropout Voltage between INCHR and BAT
Pins
Battery Over-Voltage Protection Threshold
VDO_CHARGE
VBOVP
VIN = 4.2V, ILOAD@BAT = 1000mA, RSET = 1kꢀ
200
4.4
mV
V
Voltage Regulation
Refer to Table 4
Refer to Table 4
TA = 25°C
4.20
4.375
V
VCO (REG)
Constant Output Voltage2, 3
-0.5
-1
+0.5
+1
%
%
VCO/VCO Constant Output Voltage Tolerance
TA = -40°C to +85°C
VCO(REG)
- 0.1
2.6
2.2
VRCH
VMIN
Battery Recharge Voltage Threshold
Preconditioning Voltage Threshold2, 3
MODE = High
V
V
Refer to Table 4
Refer to Table 4
2.4
2
2.8
2.4
Current Regulation
ICC_RANGE Charge Current Programmable Range
100
-15%
-10%
-10%
-15%
1.98
1600
+15%
+10%
+10%
+15%
2.02
mA
mA
mA
mA
mA
RSET = 15.8kꢀ, VBAT = 3.6V
RSET = 3.16kꢀ, VBAT = 3.6V
RSET = 1.58kꢀ, VBAT = 3.6V
RSET = 1kꢀ, VBAT = 3.6V
TA = 25°C
110
500
1000
1500
2
ICH_CC
Constant-Current Mode Charge Current
VISET
KIISET
ICH_TRK
ISET Pin Voltage
V
TA = -40°C to +85°C
VBAT = 3.6V
1.9
2
790
2.1
Charge Current Set Factor: ICH_CC/IISET
Trickle Charge Current
%
ICH_CC
%
VBAT = 2.3V
12
10
ICH_TERM
Charge Termination Threshold Current
ICH_CC
1. The AAT3696 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization and correla-
tion with statistical process controls.
2. Only options -1, -2, -5, and -6 are available.
3. Please refer to Table 9 on page 19 for complete list of options.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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201897B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Electrical Characteristics1
VIN = 5V, TA = -40 to +85°C, RISET = 3.16kꢀ, VMODE = 0V, BAT = BATS, unless otherwise noted. Typical values are at TA
= 25°C
Symbol
Description
Conditions
Min Typ Max Units
Logic Control / Battery Protection
VEN(H), VMODE(H)
VEN(L), VMODE(L)
VSTAT
Input High Threshold
Input Low Threshold
Output Low Voltage
STAT Pin Current Sink Capability
Output Low Voltage
VIN = 5V
1.2
V
V
V
mA
V
mA
0.4
0.4
8
0.4
8
STAT pin sinks 4mA
OVPFLG pin sinks 4mA
ISTAT
VOVPFLG
IOVPFLG
OVPFLG Pin Current Sink Capability
OVPFLG Assertion Delay Time from Over-
Voltage
From assertion of over-voltage
condition (OV)
TDLY_OVPFLG
1
μs
VIN voltage step up from 6V to 8V,
RLOAD = 100ꢀ, CINCHR = 1μF
RLOAD = 100ꢀ, CINCHR = 1μF
Threshold
Hysteresis
TRESPOV
TOVPR
Over-Voltage Protection Response Time
OVP Switch Turn-On Rise Time
0.5
μs
μs
ºC
100
140
15
TSHDN
Chip Thermal Shutdown Temperature
Options -1, -3, -5, -7, -9, -11, -13, -15
From release of over-voltage
condition (OV)
VIN voltage step down from 8V to
6V, RLOAD = 100ꢀ, CINCHR = 1μF
VIN voltage step up from 0V to 5V,
TRELDLY_OVPFLG_40μs OVPFLG Release Delay Time
1.5
40
μs
μs
μs
TOVPON_40μs
OVP Switch OVP Release Delay Time
OVP Switch Start Up Delay Time
TOVPSTARTON_40μs
150
250
RLOAD = 100ꢀ, CINCHR = 1μF
Options -2, -4, -6, -8 , -10, -12, -14, -16
From release of over-voltage
condition (OV)
VIN voltage step down from 8V to
6V, RLOAD = 100ꢀ, CINCHR = 1μF
VIN voltage step up from 0V to 5V,
TRELDLY_OVPFLG_80ms OVPFLG Release Delay Time
80
80
80
ms
ms
ms
TOVPON_80ms
OVP Switch OVP Release Delay Time
OVP Switch Start Up Delay Time
TOVPSTARTON_80ms
RLOAD = 100ꢀ, CINCHR = 1μF
Low Dropout Regulator (LDO)
TA = 25°C
TA = -40°C
to 85°C
VIN = 5V, ILDOOUT = 50mA
ILDOOUT = 30mA, VIN =4.9V
VOUT = 0V
4.802
4.729
4.4
4.9
4.9
4.998
5.071
ILDOOUT = 1mA to
30mA, VIN = 5.1V
VOUT
LDO Output Voltage Tolerance
V
VDO
ILIM
LDO Dropout Voltage
LDO Current Limit
200
75
300
mV
mA
VIN = 5V to 6V or 5.4V to 6.4V,
ILDOOUT = 10mA
ILDOOUT = 30mA, VIN = 5V to 6V or
5.4V to 6.4V, TR/TF = 2μs
ILDOOUT = 1mA to 30mA, TR <5μs;
VOUT/VOUT*VIN LDO Line Regulation
VOUT(Line) LDO Dynamic Line Regulation
VOUT(Load) LDO Dynamic Load Regulation
0.09
%/V
mV
25
60
mV
VIN = VOUT(NOM) +1V
1. The AAT3696 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization and correla-
tion with statistical process controls.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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201897B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Characteristics−Battery Charger
Constant Charging Current vs.
Set Resistor Values
Operating Current vs. Set Resistor Values
2400
10000
1000
100
10
Constant Current Mode
Preconditioning Mode
2100
1800
1500
1200
900
600
300
0
1
0.1
1
10
100
0.1
1
10
100
RSET (KΩ)
RSET (KΩ)
Constant Charging Current vs. Battery Voltage
Constant Charging Current vs. Temperature
(RSET = 1.58KΩ)
1200
1010
1006
1002
998
RSET = 1.58KΩ
SET = 1.96KΩ
RSET = 2.67KΩ
RSET = 3.92KΩ
RSET = 7.87KΩ
R
1000
800
600
400
200
0
994
990
2.5
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
-40
-15
10
35
60
85
Battery Voltage (V)
Temperature (°C)
Constant Charging Current vs. Input Voltage
Constant Charging Current vs. Input Voltage
(RSET =1.58KΩ)
(RSET = 3.16KΩ)
1050
1000
950
580
560
540
520
500
480
900
850
460
VBAT = 3.3V
BAT = 3.6V
VBAT = 3.9V
BAT = 4.1V
VBAT = 3.3V
800
V
VBAT = 3.6V
440
420
400
V
V
BAT = 3.9V
BAT = 4.1V
750
700
V
4.0
4.5
5.0
5.5
6.0
6.5
4.0
4.5
5.0
5.5
6.0
6.5
Input Voltage (V)
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Characteristics−Battery Charger
Preconditioning Voltage Threshold
Preconditioning Charge Current
vs. Temperature
vs. Temperature
(RSET = 1.58KΩ)
(RSET = 1.58KΩ; ICH_CC = 1000mA)
2.63
120
115
110
105
100
95
2.62
2.61
2.60
2.59
2.58
2.57
2.56
2.55
90
85
80
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
Constant Output Voltage vs. Temperature
Constant Output Voltage vs. Input Voltage
(RSET = 1.58KΩ)
(RSET =1.58KΩ)
4.210
4.208
4.206
4.204
4.202
4.200
4.198
4.196
4.194
4.192
4.190
4.220
4.215
4.210
4.205
4.200
4.195
4.190
4.185
4.180
-40
-15
10
35
60
85
5.0
5.3
5.6
5.9
6.2
6.5
Temperature (°C)
Input Voltage (V)
Enable Input Low Voltage vs. Input Voltage
Enable Input High Voltage vs. Input Voltage
0.900
0.899
0.898
0.897
0.896
0.895
0.894
0.893
0.84
0.81
0.78
0.75
0.72
0.69
0.66
85°C
85°C
0.892
25°C
25°C
0.63
0.60
0.891
-40°C
-40°C
0.890
4.0
4.5
5.0
5.5
6.0
6.5
4.0
4.5
5.0
5.5
6.0
6.5
Input Voltage (V)
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Characteristics−OVP
OVPFLG Assertion Delay Time
OVPFLG Assertion Delay Time
(RLOAD = 100ꢀ, OVP Trip Point 6.75V)
(RLOAD = 100ꢀ, OVP Trip Point 6.25V)
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
Time (1μs/div)
Time (1μs/div)
OVPFLG Release Delay Time
OVPFLG Release Delay Time
(RLOAD = 100Ω, OVP Trip Point 6.75V)
(RLOAD = 100Ω, OVP Trip Point 6.25V)
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
Time (50μs/div)
Time (50μs/div)
OVP Switch Release Delay Time
OVP Switch Release Delay Time
(RLOAD = 100Ω, All 40μs Delay Options)
(RLOAD = 100Ω, All 80ms Delay Options)
10
8
10
8
12
10
8
6
6
4
4
6
6
2
4
4
0
2
2
0
0
-2
Time (10μs/div)
Time (50ms/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Characteristics−OVP
Over-Voltage Protection Response Time
Over-Voltage Protection Response Time
(RLOAD = 100Ω, All 80ms Delay Options)
(RLOAD = 100Ω, All 40μs Delay Options)
10
8
10
8
6
6
4
4
2
0
8
6
4
2
0
2
0
8
6
4
2
0
Time (50ms/div)
Time (10μs/div)
OVP Trip Point vs. Temperature
Battery Recharge Voltage Threshold
vs. Temperature
(RSET = 1.58KΩ)
7.00
4.110
3696-1, -2
3696-5, -6
4.105
4.100
4.095
4.090
4.085
4.080
4.075
4.070
6.80
6.60
6.40
6.20
6.00
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Characteristics−LDO
LDO Output Voltage Accuracy vs. Input Voltage
LDO Output Voltage Accuracy vs. Input Voltage
(ILDOOUT = 10mA)
(ILDOOUT = 30mA)
0.4
0.3
0.2
0.1
0
0.20
0.15
0.10
0.05
0.00
-0.05
-0.1
-0.2
-0.10
85°C
85°C
25°C
25°C
-0.3
-0.15
-0.20
-40°C
-40°C
-0.4
5.1
5.3
5.5
5.7
5.9
6.1
6.3
6.5
5.1
5.3
5.5
5.7
5.9
6.1
6.3
6.5
Input Voltage (V)
Input Voltage (V)
LDO Output Voltage Accuracy vs. Temperature
(ILDOOUT = 10mA)
LDO Output Voltage Accuracy vs. Temperature
(ILDOOUT = 30mA)
1.000
0.800
0.600
0.400
0.200
0.000
-0.200
-0.400
-0.600
-0.800
-1.000
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
LDO Output Voltage vs. Temperature
LDO Output Voltage Accuracy vs. Output Current
(VIN = 5.1V; VLDOOUT = 4.9V)
(ILDOOUT = 10mA)
0.1
4.900
85°C
4.890
4.880
4.870
4.860
4.850
4.840
4.830
4.820
4.810
4.800
0
25°C
-40°C
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-40
-15
10
35
60
85
0
5
10
15
20
25
30
35
Temperature (°C)
Output Current (mA)
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Typical Characteristics−LDO
LDO Load Transient
LDO Load Transient
(VIN = 5.4V; ILDOOUT = 1mA to 30mA; COUT = 1μF)
(VIN = 5.4V; ILDOOUT = 10mA to 30mA; CLDOOUT = 1μF)
60
40
20
0
60
40
20
0
100
50
0
100
50
0
-50
-100
-50
-100
Time (100μs/div)
Time (100μs/div)
LDO Line Transient
LDO Dropout Voltage vs. Output Current
(VIN = 5.4V to 6.4V; ILDOOUT = 30mA; CLDOOUT = 1μF)
8
7
6
300
250
200
150
5
4
5.1
5
4.9
4.8
4.7
4.6
100
85°C
50
25°C
-40°C
0
0
5
10
15
20
25
30
Output Current (mA)
Time (100μs/div)
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Functional Block Diagram
INCHR
OVP
Reverse Blocking
Switch
BAT
IN
Current
CV/
BATS
Compare
OVPFLG
OVP
Pre-charge
Sense and
Control
UVLO
Constant
Current
Over-Temp
Protect
4.9V/30mA
LDOOUT
LDO
Charge
Control
MODE
IC
ISET
STAT
Charge
Status
EN
GND
Preconditioning Charge
Functional Description
Battery charging commences only after the AAT3696
checks several conditions in order to maintain a safe
charging environment. The input supply must be above
the minimum operating voltage, or under-voltage lock-
out threshold (VUVLO) and the enable pin must be low for
the charging sequence to begin. When these conditions
have been met and a battery is connected to the BAT
pin, the AAT3696 checks the state of the battery and
determines which charging mode to apply. If the battery
voltage is below the preconditioning voltage threshold
(VMIN), then the AAT3696 begins preconditioning the cell
(trickle charging) by charging at 10% of the programmed
constant current. For example, if the programmed fast
charge current is 1600mA, then the preconditioning
(trickle charge) current is 160mA. Battery cell precondi-
tioning is a safety precaution for deeply discharged cells
and will also reduce the power dissipation in the internal
series pass transistor when the voltage across the device
is at greatest potential.
The AAT3696 is a high performance battery charger IC
designed to charge single-cell Lithium-Ion or Polymer
batteries with up to 1.6A of current from external power
source. It is a stand alone charging solution requiring
minimum input components. Also included a fast turn-off
over-voltage protection (OVP) circuits with +28V and
this OVP consist of a low resistance P-channel MOSFET
in series with the charge control MOSFET. The AAT3696
also designed with of under-voltage lockout protection,
over-voltage monitor, fast shut-down circuitry with a
fault output flag, and a 4.9V LDO with 30mA output
through the OVP switch.
Battery Charging Operation
Figure 1 illustrates the entire battery charging profile or
operation, which consist of three phases:
1. Preconditioning (Trickle) Charge
2. Constant Current Charge
3. Constant Voltage Charge
4. Automatic Recharge when MODE = High
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
The AAT3696 has two charge termination control selec-
tions which can be set by the MODE pin.
Constant Current Charge
Battery cell preconditioning charge continues until the
battery voltage reaches the preconditioning voltage
threshold (VMIN). At this point, the AAT3696 begins con-
stant current charge. The current level for this mode is
programmed using a single resistor from the ISET pin to
ground. The programmed current can be set at a mini-
mum 100mA up to a maximum of 1.6A.
MODE = 0 (Ground or logic low)
The charger regulates battery voltage at 4.2V or 4.375V
optional voltage and continues to charge the battery
with a current lower than the programmed charge ter-
mination current until the AAT3696 is disabled by apply-
ing logic high to the EN pin to stop charging.
MODE = 1 (INCHR or logic high)
Constant Voltage Charge
The charger turns off the series pass device and auto-
matically goes into a power-saving sleep state. During
this time, a series pass device blocks the current in both
directions, preventing the battery from discharging
through the IC. The AAT3696 will remain in sleep mode
until the battery voltage drops below the VRCH threshold
or the charger is enabled or input power is recycled. The
AAT3696 will resume charging operation if no fault is
detected.
Constant current charge will continue until the battery
voltage reaches the constant output voltage threshold,
VCO (REG). The AAT3696 will then transition to constant
voltage mode, where the charge IC regulates the battery
voltage at constant output voltage (factory programmed
to 4.2V or 4.375V). The charging current at this phase
will decrease until the charge termination current or
10% of the programmed constant current is reached.
VCO(REG)
VRCH
ICH_CC
VMIN
Charger Turns OFF
When MODE = High
Battery Voltage
Charger Stays ON
When MODE = Low
Charger Turns ON
ICH_TRK
ICH_TERM
Battery Current
EN
Battery Recharge
Preconditioning Charge
Constant Current Charge
Constant Voltage Charge
Figure 1: Current vs. Voltage Profile during Charging Phases.
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Charger Operational Flowchart
Power Input
No
Power On
Voltage
Reset
IN>VUVLO ?
V
Yes
Yes
Fault Conditions
Monitoring?
BOV, OT
EN=High?
No
No
Yes
OVP Condition
Monitoring
VIN > VOVP
Disconnect Input
Charge Suspended
from charger
No
Preconditioning
Test
Yes
Yes
Preconditioning
(Trickle Charge)
VMIN > VBAT
No
No
Yes
Recharge Test
VBAT < VRCH
Constant Current
Current Phase Test
VCO(REG) > VBAT
Charge Mode
No
Yes
Constant Voltage
Voltage Phase Test
Charge Mode
IBAT > ITERM
No
Continuously
Yes
Chargingat
Mode = 0 ?
Constant Voltage
No
Charge
Completed
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
the charger and to reduce the power dissipation. When
the voltage on the power source exceeds the OVP trip
Charge Status Output
The AAT3696 provides battery charging status via a sta-
tus pin, STAT. This pin is internally connected to an
N-channel open-drain MOSFET, which can be used as a
logic signal, or drive an external LED. The charge status
indication pin (STAT) pulls high indicating charge com-
pletion or charge termination, regardless of the selection
of the charge termination mode, as long as the charge
termination current is reached.
point, 6.75V or 6.25V respectively, the switch immedi-
ately becomes open (OFF) and disconnect the load and
the charger from the power source therefore, preventing
damagetoanydownstreamcomponents.Simultaneously,
the fault flag is raised, alerting the system. If an over-
voltage condition is applied at the time of the device
enable, the switch remains open (OFF).
The status pin indicates the following conditions described
in Table 1:
Under-Voltage Lockout (UVLO)
The AAT3696 has a 3V (maximum) under-voltage lock-
out level (UVLO). When the input voltage is less than the
UVLO level, the OVP switch and the charger are turned
off. It is designed with 150mV hysteresis to ensure cir-
cuit stability.
Charge Status
Status
Battery is charging
Charging is completed
When EN is high
Low
High
High
Table 1: LED Status Indicator.
Over-Voltage Fault Flag Output
The over-voltage fault flag (OVPFLG) is an active-low
open-drain fault reporting output. A pull-up resistor
should be connected from to I/O voltage of the system.
In the event of an over-voltage condition OVPFLG will be
asserted immediately with approximately 1ꢁs inherited
internal circuit delay. After the over-voltage fault is
released, OVPFLG will be de-asserted with 1.5ꢁs delay
(optional of 80ms delay).
Enable/Disable
The AAT3696 provides an enable function to control the
charger IC on and off. The enable (EN) pin is internally
pulled down with 200kΩ. When EN is pulled down or left
floating, normal device operation commences. When it is
pulled to a logic high level, the AAT3696 charging circuit
will be shut down and forced into sleep state but the
over-voltage protection circuit remains in active state.
Charging will be halted regardless of the battery voltage
or charging state. When the device is re-enabled, the
charge control circuit will automatically reset and
resume charging functions with the appropriate charging
mode based on the battery charge state and measured
cell voltage at the BAT pin.
Battery Over-Voltage Protection
An over-voltage event is defined as a condition where
the voltage at the BAT pin exceeds the maximum battery
charge voltage and is set by the battery over-voltage
protection threshold (VBOVP). If an overvoltage condition
occurs sensed by the BATS pin, the AAT3696 charge
control will shut down the device until voltage at the BAT
pin drops below VBOVP. The AAT3696 will resume normal
charging operation after the over-voltage condition is
removed.
Low Dropout Regulator
The AAT3696 includes a low dropout regulator with input
range from 5V to the OVP trip point which is 6.75V or
6.25V and is always enabled. The LDO output VOUT is set
to 4.9V and supplies a continuous current up to 30mA.
The LDO output needs to be decoupled with 2.2ꢁF to
ground for stability reasons.
Over-Temperature Shutdown
The AAT3696 has a thermal protection control circuit
which will shut down charging functions if the internal
die temperature exceed the preset thermal limit thresh-
old of 140°C. Once the internal die temperature falls
below the thermal limit, normal operation will resume
the previous charging state.
Over-Voltage Protection
In normal operation, an OVP switch acts as a load
switch, connecting the power source from IN to INCHR.
This switch is designed with very low resistance to min-
imize the voltage drop between the power source and
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Battery Connection and
Battery Voltage Sensing
Application Information
Constant Charge Current
Battery Connection (BAT)
The constant current charge level is user programmed
with a set resistor connected between the ISET pin and
ground. The accuracy of the constant charge current, as
well as the preconditioning trickle charge current, is
dominated by the tolerance of the set resistor used. For
this reason, a 1% tolerance metal film resistor is recom-
mended for the set resistor function. The constant
charge current levels from 100mA to 1.6A may be set by
selecting the appropriate value from Table 2.
A single cell Li-Ion/Polymer battery should be connected
between BAT input and ground.
Battery Voltage Sensing (BATS)
The BATS pin is provided to employ an accurate voltage
sensing capability to measure the positive terminal volt-
age at the battery cell being charged. This function
reduces measured battery cell voltage error between the
battery terminal and the charge control IC. The AAT3696
charge control circuit will base charging mode states
upon the voltage sensed at the BATS pin. The BATS pin
must be connected to the battery terminal for correct
operation. If the battery voltage sense function is not
needed, the BATS pin should be terminated directly to
the BAT pin. If there is concern of the battery sense
function inadvertently becoming an open circuit, the
BATS pin may be terminated to the BAT pin using a 10kꢀ
resistor. Under normal operation, the connection to the
battery terminal will be close to 0ꢀ; if the BATS connec-
tion becomes an open circuit, the 10kꢀ resistor will pro-
vide feedback to the BATS pin from the BAT connection
with a voltage sensing accuracy loss of 1mV or less.
Charge current setting formula:
VISET
RSET
ICH_CC (typ) =
· KIISET
Constant Charge
Current (mA)
Set Resistor Value (kΩ)
110
200
400
500
600
800
1000
1500
15.8
7.87
3.92
3.16
2.67
1.96
1.58
1.00
Status Indicator Display
Simple system charging status states can be displayed
using one LED in conjunction with the STAT pin on the
AAT3696. This pin has a simple switch connecting the
LED’s cathode to ground. Refer to Table 1 for LED display
definitions. The LED anodes should be connected to VIN,
depending upon system design requirements. The LED
should be biased with as little current as necessary to
create reasonable illumination; therefore, a ballast resis-
tor should be placed between the LED cathode and the
STAT pin. LED current consumption will add to the over-
all thermal power budget for the device package, so it is
wise to keep the LED drive current to a minimum. 2mA
should be sufficient to drive most low cost green or red
LED. It is not recommended to exceed 8mA when driving
an individual status LED.
Table 2: RSET Values.
Figure 2 shows the relationship of constant charging cur-
rent and set resistor values for the AAT3696.
Charging Current vs. Set Resistor Values
10000
1000
100
10
1
0.1
1
10
100
The required ballast resistor value can be estimated
using the following formulas:
RSET (kΩ)
Figure 2: Constant Charging Current
vs. Set Resistor Values.
When connecting to the adapter supply with a red LED:
Note: The ISET pin is very sensitive and if a total capac-
itive load of more than 20pF is connected, it may start
oscillating.
VADP - VFLED
ILED(STAT)
RB(STAT)
=
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Example:
Charger Input Capacitor
A 2.2μF decoupling capacitor is recommended to be
placed between INCHR and GND.
5.5V - 2.0V
2mA
RB(STAT)
=
= 1.75kΩ
Charger Output Capacitor
Red LED forward voltage (VF) is typically 2.0V @ 2mA.
When connecting to the USB supply with a green LED:
The AAT3696 only requires a 1μF ceramic capacitor on
the BAT pin to maintain circuit stability. This value
should be increased to 10μF or more if the battery con-
nection is made any distance from the charger output. If
the AAT3696 is used in applications where the battery
can be removed from the charger, such as desktop
charging cradles, an output capacitor greater than 10μF
may be required to prevent the device from cycling on
and off when no battery is present.
VUSB - VFLED
ILED(STAT)
RB(STAT)
=
Example:
5.0V - 3.2V
2mA
RB(STAT)
=
= 900Ω
Linear Regulator Output Capacitor
Green LED forward voltage (VF) is typically 3.2V @ 2mA.
For proper load voltage regulation and operational sta-
bility, a capacitor is required between LDOOUT and GND.
The output capacitor connection to the LDO regulator
ground pin should be made as directly as practically pos-
sible for maximum device performance. Since the regu-
lator has been designed to function with very low ESR
capacitors, ceramic capacitors in the 1.0μF to 10μF
range are recommended or best performance.
Applications utilizing the exceptionally low output noise
and optimum power supply ripple rejection of the
AAT3696 should use 2.2μF or greater values for the
LDO’s output capacitor.
IC Input
The AAT3696 has an IC input pin which is internally con-
nected to ground through a 100kΩ resistor.
Capacitor Selection
Input Capacitor
A 1μF or larger capacitor is typically recommended for
CIN. CIN should be located as close to the device IN pin
as practically possible. Ceramic, tantalum, or aluminum
electrolytic capacitors may be selected for CIN. There is
no specific capacitor equivalent series resistance (ESR)
requirement for CIN. However, for higher current opera-
tion, ceramic capacitors are recommended for CIN due to
their inherent capability over tantalum capacitors to
withstand input current surges from low impedance
sources such as batteries in portable devices.
Printed Circuit Board
Layout Recommendations
For proper thermal management and to take advantage
of the low RDS(ON) of the AAT3696, a few circuit board
layout rules should be followed: IN and BAT should be
routed using wider than normal traces, and GND should
be connected to a ground plane. To maximize package
thermal dissipation and power handling capacity of the
AAT3696 TDFN3x3 package, solder the exposed paddle
of the IC onto the thermal landing of the PCB, where the
thermal landing is connected to the ground plane. If
heat is still an issue, multi-layer boards with dedicated
ground planes are recommended. Also, adding more
thermal vias on the thermal landing would help the heat
being transferred to the PCB effectively.
Typically, 50V rated capacitors are required for most of
the application to prevent any surge voltage. Ceramic
capacitors selected as small as 1206 are available which
can meet these requirements. Other voltage rating
capacitor can also be used for the known input voltage
application.
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Figure 3: AAT3696 Evaluation Board Top Layer.
Figure 4: AAT3696 Evaluation Board Bottom Layer.
LDO
C4
+5
R3
1k
D1
Red LED
D2
U1
OVPFLG
2.2μF
4
5
10
3
IC
R2
1k
EN
LDOOUT
STAT
EN
Green LED
11
12
1
2
BAT
8
2
BATS
BAT
4V - 28V
GND
JP1
C3
10μF
VIN
GND
1
2
INCHR
IN
1
9
MODE
INCHR
ISET
C1
1μF
6
7
MODE
GND
C2
2.2μF
JP2
R1
1.6k
AAT3696
Figure 5: AAT3696 Evaluation Board Schematic.
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Component
Part Number
Description
Manufacturer
U1
R1
AAT3696IWP
Chip Resistor
1.6A Linear Li-Ion/Polymer Battery Charger in TDFN33-12 Package
1.6kΩ, 1%, 1/4W; 0603
Skyworks
Vishay
R2, R3
C1
C2, C4
C3
JP1, JP2
D1
Chip Resistor
1kΩ, 5%, 1/4W; 0603
Vishay
Murata
Murata
Murata
GRM31MR71H105KA88
GRM188R61A225KE34
GRM21BR71A106KE51L
PRPN401PAEN
Ceramic 1ꢁF 50V 10% X7R 1206
Ceramic 2.2ꢁF 10V 10% X5R 0603
Ceramic 10ꢁF 10V 10% X7R 0805
Conn. Header, 2mm zip
Sullins Electronics
Lite-On Inc.
Lite-On Inc.
LTST-C190CKT
LTST-C190GKT
Red LED; 0603
Green LED; 0603
D2
Table 3: AAT3696 Evaluation Board Bill of Materials (BOM).
AAT3696 Feature Options
Constant Voltage
Regulation (V)
OVP Trip Point
OVP Turn On Delay Time Preconditioning Voltage
Product
(V)
(μs)
Threshold (V)
AAT3696-1
AAT3696-2
AAT3696-3
AAT3696-4
AAT3696-5
AAT3696-6
AAT3696-7
AAT3696-8
AAT3696-9
AAT3696-10
AAT3696-11
AAT3696-12
AAT3696-13
AAT3696-14
AAT3696-15
AAT3696-16
4.2
4.2
4.375
4.375
4.2
6.75
6.75
6.75
6.75
6.25
6.25
6.25
6.25
6.75
6.75
6.75
6.75
6.25
6.25
6.25
6.25
40
80,000
40
80,000
40
80,000
40
80,000
40
80,000
40
80,000
40
80,000
40
80,000
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
4.2
4.375
4.375
4.2
4.2
4.375
4.375
4.2
4.2
4.375
4.375
Table 4: AAT3696 Options.
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2, 3
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
TDFN33-12
6EXYY
6FXYY
AAT3696IWP-1-T1
AAT3696IWP-2-T1
AAT3696IWP-3-T1
AAT3696IWP-4-T1
AAT3696IWP-5-T1
AAT3696IWP-6-T1
AAT3696IWP-7-T1
AAT3696IWP-8-T1
AAT3696IWP-9-T1
AAT3696IWP-10-T1
AAT3696IWP-11-T1
AAT3696IWP-12-T1
AAT3696IWP-13-T1
AAT3696IWP-14-T1
AAT3696IWP-15-T1
AAT3696IWP-16-T1
6GXYY
6HXYY
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
3. For detailed description of all options, refer to Table 4 on page 19.
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DATA SHEET
AAT3696
1.6A Li-Ion Battery Charger in a 3x3TDFN Package
Package Information
TDFN33-121
Index Area
Detail "A"
0.40 0.05
0.1 REF
C0.3
Pin 1 Indicator
(optional)
3.00 0.05
1.70 0.05
Top View
Bottom View
Detail "A"
0.05 0.05
Side View
All dimensions in millimeters.
1. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing
process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.
Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a
service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Sky-
works may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no
responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here-
under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR
PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES
NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN-
CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM
THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en-
vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper
use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of pub-
lished parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product
design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.
Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for
identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
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